HELP just bought 90 300zx

[venomizzy]

What weight is right? How much oil do I need ? Just replace or flush few time?

[t.mcginley.jr]

Wait don't you have an automatic? But you said you had a flywheel..

[venomizzy]

yes, there is a flywheel on both!

[nissanfreak12]

Flexplate in an auto, flywheel in a manual.

They are completely different. Flexplate has holes to mount the TC, its thinner, has no way to mount a clutch.

Flywheel has a surface for friction material and thicker.

You cannot interchange the two. If you told the parts monkey you needed a flywheel, he is going to give you a flywheel, not a flexplate.

[venomizzy]

nissanfreak12 thanks for the clarification , yes the flexplate changed. Had a few broken teeth! How do i post pics in tread?

[z32loverboy]

upload them to photobucket or something like that and then paste the photo url inside the brackets when you click the "img" button in the full editor for replying

[Ziggy1621]

how-to-post-pictures-using-photobucket-t521110.html

[venomizzy]

Car seems to be dragging when I first take off, Seems to be starting off in 2nd (automatic) this was like that when I got the car! before the transmission service. thinking of adding treatment fluid. guy mentioned might be something electric.

[venomizzy]

ok the car is running real rich, can smell the gas.
Overdrive light stays on but turns off if I hold the button down, stays on when relese the buttom. The issue is it does NOT make any diffrent in the acceleraction. Seems like it's stuck on overdrive (OD).
1 2 D
When Drivning on D1 you can tell the diffrence from D1 to D2 but no diffrence when shifting from D2 to D.



300zx Automatic Transmission Gear Shifter Box Shift Knob Assembly

[venomizzy]

Looking for foglights if anyone selling let me know.

[Johnathon]

venomizzy, I'm experiencing the same thing as you are with the automatic transmission. Do you know the procedure to put the transmission computer into diagnostic mode? If not, Download the factory service manual , it's in the AT section. I've read posts from nissan master tech's saying that the revolution sensor is what causes the transmission to go into limp mode, which is exactly what your experience (as am i). Pin 25 on the Transmission controller is the output from the revolution sensor, if you hook a dvm up to that pin and ground, at around 19 mph it should read 1 volt or more (AC voltage). The next thing to check would be the seed sensor. I'd have to look at the schematics again, but i can tell you it's supposed to go from 5v dc to 0 vdc alternating. The diagnostic mode on the transmission controller is rather difficult IMHO to judge correctly. But if you can get it into Diagnostic mode, put it in N or P , fire it up, and take off down the road (do NOT cut the key off before you start it), and see if it shifts fine. If the revolution sensor, and speed sensor are both OK, see if you can find someone with a good AT controller, hook it up and test it out. (which is what I'm in the process of doing myself). A few other things that come to mind off hand is there is about 4 lines that run directly from the ECU to the TCU, if their not communicating for some reason it could possibly put the TCU in limp mode. Another thing to check is the temp sending units, there's one for the gauge, and one for the ECU. They both are right on front of the engine on the upper coolant pipe.

Could someone link him to the FSM? I downloaded it from Nicoclub, but alas I have forgotten the URL.

Also from reading your posts. Your OD switch on the side if your shifter is broken. Mine was as well, it's about 18 bucks @ a nissan dealership. And fairly easy to replace. It uses snap pins on 2 solid wires... just make sure you seat the wires back into the snap pins good when you replace it. Jewelers screwdrivers , or o-ring removal tools work wonders for this. (it helps do do this with the shifter in 1 ).

Good luck with it, and please post back what you find out, for the both of us.

[venomizzy]

thanks Johnathon, that's allot of info but will get to it after vacation. keep me posted, let's us the AT controller test goes